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Simulation of circulating fluidized bed combustors firing indigenous lignite
Date
2011-06-01
Author
Selçuk, Nevin
Metadata
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A comprehensive model, previously developed for a rectangular parallelepiped shaped 0.3 MW(t) circulating fluidized bed combustor (CFBC) fired with high calorific value coal burning in sand and validated against experimental data is adapted to cylindrical configuration and is extended to incorporate NO formation and reduction reactions and pressure drops around cyclone, downcomer and loop seal. Its predictive accuracy is tested by applying it to the simulation of Middle East Technical University (METU) 150 kW(t) CFBC burning low calorific value indigenous lignite with high Volatile Matter/Fixed Carbon (VM/FC) ratio in its own ash and comparing its predictions with measurements. Favorable comparisons are obtained between the predicted and measured temperatures and pressure profiles and emissions of gaseous species. Results reveal that predictive accuracy in pressure profile strongly depends on the correlation utilized for entrainment in dilute zone and that accuracy in NO emission requires data on partitioning of coal nitrogen into char-N and volatile-N and is affected significantly by dilute zone oxygen content. (C) 2011 Elsevier Masson SAS. All rights reserved.
Subject Keywords
Circulating fluidized bed
,
Turkish lignite
,
NOx emission
,
Mathematical modeling
URI
https://hdl.handle.net/11511/31622
Journal
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
DOI
https://doi.org/10.1016/j.ijthermalsci.2011.01.022
Collections
Graduate School of Natural and Applied Sciences, Article
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N. Selçuk, “Simulation of circulating fluidized bed combustors firing indigenous lignite,”
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
, pp. 1109–1115, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/31622.